- Suggest using `rustup target add` if `RUSTUP_HOME` is set. I don't know if there's any precedent for doing this, but it seems harmless enough and it will be a big help.
- Add a note about `#![no_std]` if `std` is missing but not core
- On nightly, suggest using `cargo build -Z build-std` if `CARGO` is set
- Add a note that std may be unsupported if `std` is missing but not core
- Don't suggest `#![no_std]` when the load isn't injected by the
compiler
Implement a lint that highlights all moves larger than a configured limit
Tracking issue: #83518
[MCP 420](https://github.com/rust-lang/compiler-team/issues/420) still ~blazing~ in progress
r? ```@pnkfelix```
The main open issue I see with this minimal impl of the feature is that the lint is immediately "stable" (so it can be named on stable), even if it is never executed on stable. I don't think we have the concept of unstable lint names or hiding lint names without an active feature gate, so that would be a bigger change.
Rollup of 10 pull requests
Successful merges:
- #83990 (implement `TrustedRandomAccess` for `Take` iterator adapter)
- #84250 (bootstrap: use bash on illumos to run install scripts)
- #84320 (Use details tag for trait implementors.)
- #84436 (Make a few functions private)
- #84453 (Document From implementations for Waker and RawWaker)
- #84458 (Remove unnecessary fields and parameters in rustdoc)
- #84485 (Add some associated type bounds tests)
- #84489 (Mention FusedIterator case in Iterator::fuse doc)
- #84492 (rustdoc: Remove unnecessary dummy span)
- #84496 (Add some specialization tests)
Failed merges:
r? `@ghost`
`@rustbot` modify labels: rollup
Make a few functions private
These were made public in 3105bcfdc1. This
is so long ago I doubt anyone remembers why they're public. No one outside rustc_session uses
them, including in-tree tools.
On stable, suggest removing `#![feature]` for features that have been stabilized
I don't know how to test this (https://rust-lang.zulipchat.com/#narrow/stream/182449-t-compiler.2Fhelp/topic/Run.20tests.20without.20enabling.20nightly.20features.3F). I confirmed locally that this gives the
appropriate help with `channel = "beta"`:
```
error[E0554]: `#![feature]` may not be used on the beta release channel
--> src/lib.rs:2:1
|
2 | #![feature(min_const_generics)]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
|
= help: the feature `min_const_generics` has been stable since 1.51.0 and no longer requires an attribute to enable
error[E0554]: `#![feature]` may not be used on the beta release channel
--> src/lib.rs:3:1
|
3 | #![feature(min_const_generics, min_specialization)]
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= help: the feature `min_const_generics` has been stable since 1.51.0 and no longer requires an attribute to enable
error[E0554]: `#![feature]` may not be used on the beta release channel
--> src/lib.rs:4:1
|
4 | #![feature(box_patterns)]
| ^^^^^^^^^^^^^^^^^^^^^^^^^
```
Closes https://github.com/rust-lang/rust/issues/83715.
Fix ICE if original_span(fn_sig) returns a span not in body sourcefile
Fixes: #84421
r? ````@tmandry````
fyi: ````@wesleywiser```` ````@sdroege```` ````@rajivshah3````
rustc: Use LLVM's new saturating float-to-int intrinsics
This commit updates rustc, with an applicable LLVM version, to use
LLVM's new `llvm.fpto{u,s}i.sat.*.*` intrinsics to implement saturating
floating-point-to-int conversions. This results in a little bit tighter
codegen for x86/x86_64, but the main purpose of this is to prepare for
upcoming changes to the WebAssembly backend in LLVM where wasm's
saturating float-to-int instructions will now be implemented with these
intrinsics.
This change allows simplifying a good deal of surrounding code, namely
removing a lot of wasm-specific behavior. WebAssembly no longer has any
special-casing of saturating arithmetic instructions and the need for
`fptoint_may_trap` is gone and all handling code for that is now
removed. This means that the only wasm-specific logic is in the
`fpto{s,u}i` instructions which only get used for "out of bounds is
undefined behavior". This does mean that for the WebAssembly target
specifically the Rust compiler will no longer be 100% compatible with
pre-LLVM 12 versions, but it seems like that's unlikely to be relied on
by too many folks.
Note that this change does immediately regress the codegen of saturating
float-to-int casts on WebAssembly due to the specialization of the LLVM
intrinsic not being present in our LLVM fork just yet. I'll be following
up with an LLVM update to pull in those patches, but affects a few other
SIMD things in flight for WebAssembly so I wanted to separate this change.
Eventually the entire `cast_float_to_int` function can be removed when
LLVM 12 is the minimum version, but that will require sinking the
complexity of it into other backends such as Cranelfit.
RustWrapper: work around unification of diagnostic handlers
This lets me build against llvm/main as of March 23rd, 2021. I'm not
entirely sure this is _correct_, but it appears to be functionally
identical to what was done in LLVM: existing callsites of
setInlineAsmDiagnosticHandler were moved to SetDiagnosticHandler() on
the context object, which we already set up in both places that we
called setInlineAsmDiagnosticHandler().
Use arrayvec 0.7, drop smallvec 0.6
With the arrival of min const generics, many alt-vec libraries have
updated to use it in some way and arrayvec is no exception. Use the
latest with minor refactoring.
Also, rustc_workspace_hack is the only user of smallvec 0.6 in the
entire tree, so drop it.
This lets me build against llvm/main as of March 23rd, 2021. I'm not
entirely sure this is _correct_, but it appears to be functionally
identical to what was done in LLVM: existing callsites of
setInlineAsmDiagnosticHandler were moved to SetDiagnosticHandler() on
the context object, which we already set up in both places that we
called setInlineAsmDiagnosticHandler().
Check for intrinsics before coercing to a function pointer
Return an error if coercing function items / non-capturing closures
to a common function pointer type would require reifying an intrinsic.
Turns ICE reported in #84297 into a proper error.
With the arrival of min const generics, many alt-vec libraries have
updated to use it in some way and arrayvec is no exception. Use the
latest with minor refactoring.
Also, rustc_workspace_hack is the only user of smallvec 0.6 in the
entire tree, so drop it.
Rollup of 12 pull requests
Successful merges:
- #84013 (Replace all `fmt.pad` with `debug_struct`)
- #84119 (Move `sys::vxworks` code to `sys::unix`)
- #84212 (Replace `Void` in `sys` with never type)
- #84251 (fix 'const-stable since' for NonZeroU*::new_unchecked)
- #84301 (Document that `index` and `index_mut` can panic)
- #84365 (Improve the docstrings of the `Lto` struct.)
- #84378 (Fix broken doc link)
- #84379 (Add GAT related tests)
- #84380 (Write Rustdoc titles like "x in crate::mod - Rust")
- #84390 (Format `Struct { .. }` on one line even with `{:#?}`.)
- #84393 (Support `x.py doc std --open`)
- #84406 (Remove `delete` alias from `mem::drop`.)
Failed merges:
- #84387 (Move `sys_common::poison` to `sync::poison`)
r? `@ghost`
`@rustbot` modify labels: rollup
This commit updates rustc, with an applicable LLVM version, to use
LLVM's new `llvm.fpto{u,s}i.sat.*.*` intrinsics to implement saturating
floating-point-to-int conversions. This results in a little bit tighter
codegen for x86/x86_64, but the main purpose of this is to prepare for
upcoming changes to the WebAssembly backend in LLVM where wasm's
saturating float-to-int instructions will now be implemented with these
intrinsics.
This change allows simplifying a good deal of surrounding code, namely
removing a lot of wasm-specific behavior. WebAssembly no longer has any
special-casing of saturating arithmetic instructions and the need for
`fptoint_may_trap` is gone and all handling code for that is now
removed. This means that the only wasm-specific logic is in the
`fpto{s,u}i` instructions which only get used for "out of bounds is
undefined behavior". This does mean that for the WebAssembly target
specifically the Rust compiler will no longer be 100% compatible with
pre-LLVM 12 versions, but it seems like that's unlikely to be relied on
by too many folks.
Note that this change does immediately regress the codegen of saturating
float-to-int casts on WebAssembly due to the specialization of the LLVM
intrinsic not being present in our LLVM fork just yet. I'll be following
up with an LLVM update to pull in those patches, but affects a few other
SIMD things in flight for WebAssembly so I wanted to separate this change.
Eventually the entire `cast_float_to_int` function can be removed when
LLVM 12 is the minimum version, but that will require sinking the
complexity of it into other backends such as Cranelfit.
Suggest `.as_ref()` on borrow error involving `Option`/`Result`
When encountering a E0382 borrow error involving an `Option` or `Result`
provide a suggestion to use `.as_ref()` on the prior move location to
avoid the move.
Fix#84165.
coverage of async function bodies should match non-async
This fixes some missing coverage within async function bodies.
Commit 1 demonstrates the problem in the fixed issue, and commit 2 corrects it.
Fixes: #83985
Add coverage to continue statements
`continue` statements were missing coverage. This was particularly
noticeable in a match pattern that contained only a `continue`
statement, leaving the branch appear uncounted. This PR addresses the
problem and adds tests to prove it.
r? `@tmandry`
cc: `@wesleywiser`
When encountering a E0382 borrow error involving an `Option` or `Result`
provide a suggestion to use `.as_ref()` on the prior move location to
avoid the move.
Fix#84165.
